GCSE Physics – Halflife
Learning Objectives
I can define the term halflife
I can relate halflife to radioactive decay
I can determine halflife from graphic or mathematical information
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Question 1 of 20
1. Question
What type of process is radioactive decay?
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Question 2 of 20
2. Question
What does the halflife involve?
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Question 3 of 20
3. Question
What is halflife of a radioactive isotope?
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Question 4 of 20
4. Question
How else can halflife of a radioactive isotope be defined?
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Question 5 of 20
5. Question
What is the range of halflife of radioactive isotopes?
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Question 6 of 20
6. Question
Why do we use large sources to measure halflife?
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Question 7 of 20
7. Question
What type of graph will a nonradioactive nuclei vs time graph be?
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Question 8 of 20
8. Question
What type of graph will an activity vs time graph be?
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Question 9 of 20
9. Question
What type of graph will a count rate vs time graph be?
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Question 10 of 20
10. Question
How do we express the percentage remaining after 2 half lives?
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Question 11 of 20
11. Question
How do we express the percentage remaining after 3 half lives?
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Question 12 of 20
12. Question
What is the halflife of a sample where activity drops from 2 Bq to 0.02 Bq in 21 days?
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Question 13 of 20
13. Question
If it takes 2 days for activity to drop from 10,000 Bq to 2,500 Bq what is the half life?
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Question 14 of 20
14. Question
If it takes 6000 years for activity to drop from 100,000 Bq to 50,000 Bq what is the half life?
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Question 15 of 20
15. Question
If it takes 160 years for activity to drop from 32,000 Bq to 2,000 Bq what is the half life?
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Question 16 of 20
16. Question
What is the halflife of a sample where activity drops from 1,200 Bq to 300 Bq in 10 days?
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Question 17 of 20
17. Question
What is the halflife of a sample where activity drops from 1,200 Bq to 600 Bq in 6 days?
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Question 18 of 20
18. Question
What is the halflife of a sample where activity drops from 1,200 Bq to 75 Bq in 4 days?
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Question 19 of 20
19. Question
What is the halflife of a sample where activity drops from 10 Bq to 1.25 Bq in 9 days?
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Question 20 of 20
20. Question
The halflife of a plutonium isotope is 5 years. How much of 100g of plutonium will be left after 15 years?
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